CN106997668B - Method and system for evaluating control efficiency of intersection annunciator by mobile phone mobile data - Google Patents
Method and system for evaluating control efficiency of intersection annunciator by mobile phone mobile data Download PDFInfo
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- CN106997668B CN106997668B CN201710252913.6A CN201710252913A CN106997668B CN 106997668 B CN106997668 B CN 106997668B CN 201710252913 A CN201710252913 A CN 201710252913A CN 106997668 B CN106997668 B CN 106997668B
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/0104—Measuring and analyzing of parameters relative to traffic conditions
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- G08G1/00—Traffic control systems for road vehicles
- G08G1/097—Supervising of traffic control systems, e.g. by giving an alarm if two crossing streets have green light simultaneously
Abstract
The method and the system for evaluating the control efficiency of the intersection annunciator by utilizing the mobile data of the mobile phone set the detection range on the electronic map of the intersection containing the traffic efficiency needing to evaluate the control efficiency of the annunciator, wherein the start line of the detection range is superposed with the stop line of the intersection, and the detection range covers the preset distance at the upstream of the stop line. The method comprises the steps of acquiring mobile phone data of all mobile phones within a detection range in real time, wherein the mobile phone data comprise ID numbers, positions and moving speeds of the mobile phones, associating the mobile phone data of each mobile phone to an electronic map, and accurately calculating the time of lighting red lights in each direction according to the mobile phone data, wherein the number of the mobile phones staying within the detection range and the time of each mobile phone staying respectively, so that the total staying time of all mobile phones waiting for the red lights can be calculated and used as the waiting time. And whether the intersection signal lamp control efficiency is ideal or not is evaluated according to the ratio of the red lamp waiting time in the two directions, so that the quantitative evaluation of the signal lamp efficiency is realized.
Description
Technical Field
The invention relates to the field of road traffic management, in particular to a method and a system for evaluating control efficiency of an intersection signal machine by mobile phone mobile data.
Background
Road traffic congestion has attracted high attention of governments at all levels, and how to relieve the road traffic congestion becomes a subject of research of expert scholars. The traffic jam is caused by imbalance between traffic supply and traffic demand, the key for meeting the traffic demand and relieving the traffic jam is to improve supply efficiency and relieve the traffic jam, the traffic demand mainly refers to movement of people and objects, and the traffic jam relieving usually focuses on solving the traffic capacity of motor vehicles at roads and intersections. In recent years, domestic and foreign traffic management departments increasingly pay more attention to the problem of the moving efficiency of people, many cities adopt strategies such as priority of public transport vehicles or multi-person shared vehicles by public transport lanes and intersection signal lamps, the strategies aim is to improve the moving efficiency of most people, particularly whether the traffic capacity of people at crossroads is maximized in unit time, but a quantitative analysis method for the implementation effect of the strategies is lacking at present.
Disclosure of Invention
The invention aims to solve the technical problem that the control efficiency of an intersection signal lamp cannot be quantitatively evaluated in the prior art, and further provides a method and a system for evaluating the control efficiency of the intersection signal lamp by utilizing mobile phone mobile data.
In order to solve the technical problem, the invention provides a method for evaluating the control efficiency of an intersection annunciator by utilizing mobile data of a mobile phone, which comprises the following steps:
setting a detection range on an electronic map of an intersection containing traffic efficiency needing to evaluate the control efficiency of the annunciator, wherein a starting line of the detection range is overlapped with a stop line of the intersection, and the detection range covers a preset distance at the upstream of the stop line;
acquiring mobile phone data of all mobile phones within the detection range in real time, wherein the mobile phone data comprise ID numbers, positions and moving speeds of the mobile phones, and associating the mobile phone data of each mobile phone to a corresponding intersection in the electronic map;
in the red light duration time of the first direction of the intersection, obtaining the sum of the residence time of all the mobile phones as the first red light waiting time according to the ID number and the moving speed of each mobile phone in the first direction detection range;
within the red light duration time of the second direction of the intersection, obtaining the sum of the residence time of all the mobile phones as the second red light waiting time according to the ID number and the moving speed of each mobile phone within the detection range of the second direction;
and if the ratio of the first red light waiting time to the second red light waiting time is within the threshold range, judging that the control efficiency of the signal lamp of the current intersection is optimal, otherwise, judging that the control efficiency of the signal lamp of the current intersection is not optimal.
Optionally, in the method for evaluating control efficiency of an intersection traffic signal by using mobile phone movement data, in a red light duration of a first direction of an intersection, according to an ID number and a movement speed of each mobile phone, a sum of residence times of all the mobile phones is obtained as a first red light waiting time, which specifically includes:
when the red light in the first direction is on, detecting the number N of all the mobile phones with the speed of zero in the first direction detection range once per secondiWherein i is more than or equal to 0 and less than or equal to A-1, A represents the duration length of the red light in the first direction and takes seconds as a unit;
the first red light waiting time may be calculated according to the following formula:
optionally, in the method for evaluating control efficiency of an intersection traffic signal by using mobile phone movement data, in a red light duration time of a second direction of the intersection, according to an ID number and a moving speed of each mobile phone in a detection range of the second direction, a sum of residence times of all the mobile phones is obtained as a second red light waiting time, which specifically includes:
detecting the number Np of all mobile phones with the speed being zero in a second direction detection range once every second from the time when the red light in the second direction is turned on, wherein P is more than or equal to 0 and less than or equal to P-1, P represents the duration length of the red light in the second direction and takes seconds as a unit;
the second red light waiting time may be calculated according to the following formula:
optionally, in the method for evaluating control efficiency of an intersection traffic signal by using mobile phone data, if a ratio of the first red light waiting time to the second red light waiting time is within a threshold range, it is determined that control efficiency of a current intersection signal lamp is optimal, otherwise, it is determined that control efficiency of the current intersection signal lamp is not optimal, where:
the threshold range is 0.8-1.2.
The invention also provides a system for evaluating the control efficiency of the intersection annunciator by utilizing the mobile data of the mobile phone, which comprises the following steps:
the detection range setting unit is used for setting a detection range on an electronic map of the intersection containing the traffic efficiency needing to evaluate the control efficiency of the annunciator, wherein the starting line of the detection range is superposed with the stop line of the intersection, and the detection range covers the preset distance at the upstream of the stop line;
the mobile phone data association unit is used for acquiring mobile phone data of all mobile phones within the detection range in real time, wherein the mobile phone data comprise ID numbers, positions and moving speeds of the mobile phones, and associating the mobile phone data of each mobile phone to a corresponding intersection in the electronic map;
the first waiting time acquisition unit is used for acquiring the sum of the residence time of all the mobile phones as the first red light waiting time according to the ID number and the moving speed of each mobile phone in the first direction detection range in the red light duration time of the first direction of the intersection;
the second waiting time obtaining unit is used for obtaining the sum of the residence time of all the mobile phones as the second red light waiting time according to the ID number and the moving speed of each mobile phone in the second direction detection range in the red light duration time of the second direction of the intersection;
and the signal lamp control efficiency evaluation unit judges that the control efficiency of the signal lamp at the current intersection is optimal if the ratio of the first red lamp waiting time to the second red lamp waiting time is within a threshold range, or judges that the control efficiency of the signal lamp at the current intersection is not optimal.
Optionally, in the system for evaluating control efficiency of an intersection traffic signal by using mobile data of a mobile phone, the first waiting time obtaining unit is specifically configured to:
when the red light in the first direction is on, detecting the number N of all the mobile phones with the speed of zero in the first direction detection range once per secondiWherein i is more than or equal to 0 and less than or equal to A-1, A represents the duration length of the red light in the first direction and takes seconds as a unit;
the first red light waiting time may be calculated according to the following formula:
optionally, in the system for evaluating control efficiency of an intersection signal by using mobile data of a mobile phone, the second waiting time obtaining unit is specifically configured to:
detecting the number Np of all mobile phones with the speed being zero in a second direction detection range once every second from the time when the red light in the second direction is turned on, wherein P is more than or equal to 0 and less than or equal to P-1, P represents the duration length of the red light in the second direction and takes seconds as a unit;
the second red light waiting time may be calculated according to the following formula:
optionally, in the system for evaluating the control efficiency of the intersection traffic signal by using the mobile phone mobile data, the signal lamp control efficiency evaluation unit includes:
the threshold range is 0.8-1.2.
Compared with the scheme in the prior art, the technical scheme provided by the invention at least has the following beneficial effects:
the invention provides a method and a system for evaluating the control efficiency of an intersection annunciator by utilizing mobile phone mobile data, a detection range is set on an electronic map of an intersection including traffic efficiency requiring evaluation of traffic signal control efficiency, the starting line of the detection range is coincident with the stop line of the intersection, the detection range covers the preset distance of the upstream of the stop line to obtain the mobile phone data of all the mobile phones in the detection range in real time, the mobile phone data comprises ID numbers, positions and moving speeds of the mobile phones, the mobile phone data of each mobile phone is related to a corresponding intersection in the electronic map, the time of the red light on each direction can be accurately calculated according to the data of the mobile phone, how many mobile phones stay in the detection range, therefore, the staying time of each mobile phone at the red light and the total staying time of all mobile phones waiting for the red light can be calculated and taken as the waiting time. And whether the intersection signal lamp control efficiency is ideal or not is evaluated according to the ratio of the red lamp waiting time in the two directions, so that the intersection signal lamp control efficiency is quantitatively evaluated.
Drawings
In order that the present invention may be more readily and clearly understood, reference is now made to the following detailed description of the invention taken in conjunction with the accompanying drawings, in which,
fig. 1 is a flowchart of a method for evaluating intersection traffic signal control efficiency by using mobile phone mobile data according to an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating a detection range setting manner according to an embodiment of the present invention;
FIG. 3 is a flowchart illustrating a method for calculating a first direction red light waiting time according to an embodiment of the present invention;
fig. 4 is a schematic block diagram of a system for evaluating intersection traffic signal control efficiency by using mobile phone mobile data according to an embodiment of the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. And the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.
Example 1
The embodiment provides a method for evaluating control efficiency of an intersection signal by using mobile phone mobile data, as shown in fig. 1, the method comprises the following steps:
s1: setting a detection range on an electronic map of an intersection containing traffic efficiency needing to evaluate the control efficiency of the signal machine, wherein as shown in fig. 2, a starting line of the detection range is overlapped with a stop line of the intersection, and the detection range covers a preset distance at the upstream of the stop line; the maximum preset distance can be selected as the position of a stop line of an upstream intersection, or directly selected as a fixed distance such as 300 meters.
S2: acquiring mobile phone data of all mobile phones within the detection range in real time, wherein the mobile phone data comprise ID numbers, positions and moving speeds of the mobile phones, and associating the mobile phone data of each mobile phone to a corresponding intersection in the electronic map; existing mobile phones each have a positioning function module and transmit their own Location Information to a mobile communication data center in real time, such as an existing LBS (Location Based Service), which obtains Location Information (Geographic coordinates or geodetic coordinates) of a mobile phone user through a radio communication network (e.g., GSM network, CDMA network) of a telecommunication mobile operator or an external positioning manner (e.g., GPS), and provides corresponding services to the user with support of a GIS (Geographic Information System) platform. Therefore, the specific position and speed information of each mobile phone can be directly obtained from the mobile communication data center. For each mobile phone, it has its own specific attribute information, such as the mobile phone number, the IMEI number of the mobile phone hardware, etc., and the mobile phone can be uniquely located according to the specific information of the mobile phone. The mobile phone is basically a device which is always carried by people when people go out, so that the position and speed data of people can be represented by the position and speed data of the mobile phone.
S3: in the red light duration time of the first direction of the intersection, obtaining the sum of the residence time of all the mobile phones as the first red light waiting time according to the ID number and the moving speed of each mobile phone in the first direction detection range;
s4: within the red light duration time of the second direction of the intersection, obtaining the sum of the residence time of all the mobile phones as the second red light waiting time according to the ID number and the moving speed of each mobile phone within the detection range of the second direction;
s5: and if the ratio of the first red light waiting time to the second red light waiting time is within the threshold range, judging that the control efficiency of the signal lamp of the current intersection is optimal, otherwise, judging that the control efficiency of the signal lamp of the current intersection is not optimal. The threshold range can be selected according to practical conditions, and is preferably between 0.8 and 1.2.
In the solution provided in this embodiment, as shown in fig. 3, step S3 may be implemented as follows:
s301, detecting once per second from the time when the red light in the first direction is onNumber N of mobile phones with zero speed in direction detection rangeiWherein i is more than or equal to 0 and less than or equal to A-1, A represents the duration length of the red light in the first direction and takes seconds as a unit;
s302, the first red light waiting time can be calculated according to the following formula:
the above calculation process is illustrated below by a specific example.
Assuming that the red light duration in the first direction is 30 seconds, when the red light in the first direction is turned on, detecting the number N of all mobile phones with zero speed in the current detection range0Can be considered to have N0The number N of mobile phones with the speed of zero detected every second when the mobile phones are in a stop state and wait for a red lightiThen a total of 30 data N are detected0To N29。
Obviously, for N detected right after the red light is turned on0And each mobile phone has the waiting time of 30 seconds, namely the red light duration time A. And N detected one second later1In a mobile phone, there are (N)1-N0) A new handset is added, and the waiting time of the new part of handsets is (A-1) ═ 29 seconds, and the previous N0The waiting time of each mobile phone should not be counted, so in the current detection period, the waiting time should be: n is a radical of0×30+(N1-N0) X 29. Accordingly, after one second has elapsed, there is (N)2-N1-N0) A new handset is added, and the waiting time of the new part of handsets should be 28 seconds, and the previous N1The waiting time of each mobile phone should not be counted, so in the current detection period, the waiting time should be: n is a radical of0×30+(N1-N0)×29+(N2-N1-N0) X 28; by analogy, the number of the newly added mobile phones in the ith second is (N)i-Ni-1-Ni-2-…-N0) The waiting time should be a-i seconds; until at the time of 29 th second, at 2 ndThe newly-increased mobile phone waiting time of 9 seconds is only 1 second, and the red light is immediately turned to green light at the 30 th second, and the dead time is not increased. Therefore, in calculating the sum of the dead time of all handsets, the following formula can be used:
similarly, when calculating the red light waiting time in the second direction, the following steps can be adopted:
s401: when the red light in the second direction is on, detecting the number N of all the mobile phones with the speed being zero in the second direction detection range once every secondpWherein P is more than or equal to 0 and less than or equal to P-1, and P represents the duration length of the red light in the second direction and takes seconds as a unit;
s402: the second red light waiting time may be calculated according to the following formula:
according to the scheme of the embodiment, the number of the mobile phones staying in the detection range in the time of the red light on each direction can be accurately calculated according to the mobile phone data, so that the total staying time of all the mobile phones waiting for the red light can be calculated and taken as the waiting time. And whether the intersection signal lamp control efficiency is ideal or not is evaluated according to the ratio of the red lamp waiting time in the two directions, so that the intersection signal lamp control efficiency is quantitatively evaluated.
Example 2
The present embodiment provides a system for evaluating intersection traffic signal control efficiency by using mobile phone movement data, as shown in fig. 4, including:
a detection range setting unit 1, which sets a detection range on an electronic map of an intersection containing traffic efficiency requiring evaluation of the control efficiency of the signal machine, wherein the start line of the detection range coincides with the stop line of the intersection, and the detection range covers a preset distance at the upstream of the stop line; the starting line of the detection range is overlapped with the stop line of the intersection, and the detection range covers the preset distance of the upstream of the stop line; the maximum preset distance can be selected as the position of a stop line of an upstream intersection, or directly selected as a fixed distance such as 300 meters.
The mobile phone data association unit 2 is used for acquiring mobile phone data of all mobile phones within the detection range in real time, wherein the mobile phone data comprise ID numbers, positions and moving speeds of the mobile phones, and associating the mobile phone data of each mobile phone to a corresponding intersection in the electronic map; existing mobile phones each have a positioning function module and transmit their own Location Information to a mobile communication data center in real time, such as an existing LBS (Location Based Service), which obtains Location Information (Geographic coordinates or geodetic coordinates) of a mobile phone user through a radio communication network (e.g., GSM network, CDMA network) of a telecommunication mobile operator or an external positioning manner (e.g., GPS), and provides corresponding services to the user with support of a GIS (Geographic Information System) platform. Therefore, the specific position and speed information of each mobile phone can be directly obtained from the mobile communication data center. For each mobile phone, it has its own specific attribute information, such as the mobile phone number, the IMEI number of the mobile phone hardware, etc., and the mobile phone can be uniquely located according to the specific information of the mobile phone. The mobile phone is basically a device which is always carried by people when people go out, so that the position and speed data of people can be represented by the position and speed data of the mobile phone.
The first waiting time obtaining unit 3 obtains the sum of the residence time of all the mobile phones as the first red light waiting time according to the ID number and the moving speed of each mobile phone in the first direction detection range in the red light duration time of the first direction of the intersection;
the second waiting time obtaining unit 4 obtains the sum of the residence time of all the mobile phones as the second red light waiting time according to the ID number and the moving speed of each mobile phone in the second direction detection range in the red light duration time of the second direction of the intersection;
and the signal lamp control efficiency evaluation unit 5 judges that the control efficiency of the signal lamp at the current intersection is optimal if the ratio of the first red lamp waiting time to the second red lamp waiting time is within a threshold range, or judges that the control efficiency of the signal lamp at the current intersection is not optimal.
In the solution provided in this embodiment, the first latency obtaining unit 3 may be specifically configured to:
when the red light in the first direction is on, detecting the number N of all the mobile phones with the speed of zero in the first direction detection range once per secondiWherein i is more than or equal to 0 and less than or equal to A-1, A represents the duration length of the red light in the first direction and takes seconds as a unit; the first red light waiting time may be calculated according to the following formula: t1 ═ Ni＝0×A+∑(Ni-Ni-1-Ni-2-…-Ni＝0) X (A-i), wherein i is more than or equal to 1 and less than or equal to A-1.
The above calculation process is illustrated below by a specific example.
Assuming that the red light duration in the first direction is 30 seconds, when the red light in the first direction is turned on, detecting the number N of all mobile phones with zero speed in the current detection range0Can be considered to have N0The number N of mobile phones with the speed of zero detected every second when the mobile phones are in a stop state and wait for a red lightiThen a total of 30 data N are detected0To N29。
Obviously, for N detected right after the red light is turned on0And each mobile phone has the waiting time of 30 seconds, namely the red light duration time A. And N detected one second later1In a mobile phone, there are (N)1-N0) A new handset is added, and the waiting time of the new part of handsets is (A-1) ═ 29 seconds, and the previous N0The waiting time of each mobile phone should not be counted, so in the current detection period, the waiting time should be: n is a radical of0×30+(N1-N0) X 29. Accordingly, after one second has elapsed, there is (N)2-N1-N0) A new handset is added, and the waiting time of the new part of handsets should be 28 seconds, and the previous N1The waiting time of each mobile phone should not be counted, so in the current detection period, the waiting time should be: n is a radical of0×30+(N1-N0)×29+(N2-N1-N0) X 28; by analogy, the number of the newly added mobile phones in the ith second is (N)i-Ni-1-Ni-2-…-N0) The waiting time should be a-i seconds; the newly added mobile phone waiting time in the 29 th second is only 1 second until the 29 th second, and the red light is immediately turned to the green light at the 30 th second, so that the dead time is not increased. Therefore, in calculating the sum of the dead time of all handsets, the following formula can be used:
similarly, the second waiting time obtaining unit 4 is specifically configured to:
detecting the number Np of all mobile phones with the speed being zero in a second direction detection range once every second from the time when the red light in the second direction is turned on, wherein P is more than or equal to 0 and less than or equal to P-1, P represents the duration length of the red light in the second direction and takes seconds as a unit; the second red light waiting time may be calculated according to the following formula:
according to the scheme of the embodiment, the number of the mobile phones staying in the detection range in the time of the red light on each direction can be accurately calculated according to the mobile phone data, so that the total staying time of all the mobile phones waiting for the red light can be calculated and taken as the waiting time. And whether the intersection signal lamp control efficiency is ideal or not is evaluated according to the ratio of the red lamp waiting time in the two directions, so that the intersection signal lamp control efficiency is quantitatively evaluated.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (4)
1. A method for evaluating control efficiency of an intersection annunciator by utilizing mobile data of a mobile phone is characterized by comprising the following steps:
setting a detection range on an electronic map of an intersection containing traffic efficiency needing to evaluate the control efficiency of the annunciator, wherein a starting line of the detection range is overlapped with a stop line of the intersection, and the detection range covers a preset distance at the upstream of the stop line;
acquiring mobile phone data of all mobile phones within the detection range in real time, wherein the mobile phone data comprise ID numbers, positions and moving speeds of the mobile phones, and associating the mobile phone data of each mobile phone to corresponding intersection coordinates in the electronic map;
in the red light duration time of the first direction of the intersection, obtaining the sum of the residence time of all the mobile phones as the first red light waiting time according to the ID number and the moving speed of each mobile phone in the first direction detection range;
within the red light duration time of the second direction of the intersection, obtaining the sum of the residence time of all the mobile phones as the second red light waiting time according to the ID number and the moving speed of each mobile phone within the detection range of the second direction;
if the ratio of the first red light waiting time to the second red light waiting time is within the threshold range, judging that the control efficiency of the signal lamp of the current intersection is optimal, otherwise, judging that the control efficiency of the signal lamp of the current intersection is not optimal;
in the red light duration time of the first direction of the intersection, according to the ID number and the moving speed of each mobile phone, the sum of the residence time of all the mobile phones is obtained and used as the first red light waiting time, and the method specifically comprises the following steps:
when the red light in the first direction is on, detecting the number N of all the mobile phones with the speed of zero in the first direction detection range once per secondiWherein i is more than or equal to 0 and less than or equal to A-1, A represents the duration length of the red light in the first direction and takes seconds as a unit;
the first red light waiting time may be calculated according to the following formula:
in the red light duration time of the second direction of the intersection, according to the ID number and the moving speed of each mobile phone in the second direction detection range, the sum of the residence time of all the mobile phones is obtained as the second red light waiting time, which specifically includes:
detecting the number Np of all mobile phones with the speed being zero in a second direction detection range once every second from the time when the red light in the second direction is turned on, wherein P is more than or equal to 0 and less than or equal to P-1, P represents the duration length of the red light in the second direction and takes seconds as a unit;
the second red light waiting time may be calculated according to the following formula:
2. the method of claim 1, wherein if a ratio of the first red light waiting time to the second red light waiting time is within a threshold range, it is determined that the control efficiency of the signal lamp at the current intersection is optimal, otherwise it is determined that the control efficiency of the signal lamp at the current intersection is not optimal, wherein:
the threshold range is 0.8-1.2.
3. A system for evaluating control efficiency of an intersection annunciator by utilizing mobile data of a mobile phone is characterized by comprising the following steps:
the detection range setting unit is used for setting a detection range on an electronic map of the intersection containing the traffic efficiency needing to evaluate the control efficiency of the annunciator, wherein the starting line of the detection range is superposed with the stop line of the intersection, and the detection range covers the preset distance at the upstream of the stop line;
the mobile phone data association unit is used for acquiring mobile phone data of all mobile phones within the detection range in real time, wherein the mobile phone data comprise ID numbers, positions and moving speeds of the mobile phones, and associating the mobile phone data of each mobile phone to a corresponding intersection in the electronic map;
the first waiting time acquisition unit is used for acquiring the sum of the residence time of all the mobile phones as the first red light waiting time according to the ID number and the moving speed of each mobile phone in the first direction detection range in the red light duration time of the first direction of the intersection;
the second waiting time obtaining unit is used for obtaining the sum of the residence time of all the mobile phones as the second red light waiting time according to the ID number and the moving speed of each mobile phone in the second direction detection range in the red light duration time of the second direction of the intersection;
the signal lamp control efficiency evaluation unit judges that the control efficiency of the signal lamp of the current intersection is optimal if the ratio of the first red lamp waiting time to the second red lamp waiting time is within a threshold range, or judges that the control efficiency of the signal lamp of the current intersection is not optimal;
the first latency obtaining unit is specifically configured to:
when the red light in the first direction is on, detecting the number N of all the mobile phones with the speed of zero in the first direction detection range once per secondiWherein i is more than or equal to 0 and less than or equal to A-1, A represents the duration length of the red light in the first direction and takes seconds as a unit;
the first red light waiting time may be calculated according to the following formula:
the second waiting time obtaining unit is specifically configured to:
detecting the number Np of all mobile phones with the speed being zero in a second direction detection range once every second from the time when the red light in the second direction is turned on, wherein P is more than or equal to 0 and less than or equal to P-1, P represents the duration length of the red light in the second direction and takes seconds as a unit;
the second red light waiting time may be calculated according to the following formula:
4. the system for evaluating the control efficiency of the intersection signal machine by using the mobile data of the mobile phone according to claim 3, wherein in the signal lamp control efficiency evaluation unit:
the threshold range is 0.8-1.2.
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| CN101101703A (en) * | 2007-07-24 | 2008-01-09 | 深圳市融合视讯科技有限公司 | Automatic judgement and inquiry method for traffic jam degree |
| US8618954B2 (en) * | 2008-10-27 | 2013-12-31 | James J Free | Mobile FLOW readout and mobile FLOW sequencer features |
| CN101702262B (en) * | 2009-11-06 | 2011-08-17 | 北京交通大学 | Data syncretizing method for urban traffic circulation indexes |
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